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Diffstat (limited to 'Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.yaml')
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diff --git a/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.yaml b/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.yaml new file mode 100644 index 000000000..95f59a5e3 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.yaml @@ -0,0 +1,121 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mmc/rockchip-dw-mshc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Rockchip designware mobile storage host controller + +description: + Rockchip uses the Synopsys designware mobile storage host controller + to interface a SoC with storage medium such as eMMC or SD/MMC cards. + This file documents the combined properties for the core Synopsys dw mshc + controller that are not already included in the synopsys-dw-mshc-common.yaml + file and the Rockchip specific extensions. + +allOf: + - $ref: "synopsys-dw-mshc-common.yaml#" + +maintainers: + - Heiko Stuebner <heiko@sntech.de> + +# Everything else is described in the common file +properties: + compatible: + oneOf: + # for Rockchip RK2928 and before RK3288 + - const: rockchip,rk2928-dw-mshc + # for Rockchip RK3288 + - const: rockchip,rk3288-dw-mshc + - items: + - enum: + - rockchip,px30-dw-mshc + - rockchip,rk1808-dw-mshc + - rockchip,rk3036-dw-mshc + - rockchip,rk3128-dw-mshc + - rockchip,rk3228-dw-mshc + - rockchip,rk3308-dw-mshc + - rockchip,rk3328-dw-mshc + - rockchip,rk3368-dw-mshc + - rockchip,rk3399-dw-mshc + - rockchip,rk3568-dw-mshc + - rockchip,rv1108-dw-mshc + - rockchip,rv1126-dw-mshc + - const: rockchip,rk3288-dw-mshc + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + minItems: 2 + maxItems: 4 + description: + Handle to "biu" and "ciu" clocks for the bus interface unit clock and + the card interface unit clock. If "ciu-drive" and "ciu-sample" are + specified in clock-names, it should also contain + handles to these clocks. + + clock-names: + minItems: 2 + items: + - const: biu + - const: ciu + - const: ciu-drive + - const: ciu-sample + description: + Apart from the clock-names "biu" and "ciu" two more clocks + "ciu-drive" and "ciu-sample" are supported. They are used + to control the clock phases, "ciu-sample" is required for tuning + high speed modes. + + rockchip,default-sample-phase: + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 0 + maximum: 360 + default: 0 + description: + The default phase to set "ciu-sample" at probing, + low speeds or in case where all phases work at tuning time. + If not specified 0 deg will be used. + + rockchip,desired-num-phases: + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 0 + maximum: 360 + default: 360 + description: + The desired number of times that the host execute tuning when needed. + If not specified, the host will do tuning for 360 times, + namely tuning for each degree. + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/clock/rk3288-cru.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/interrupt-controller/irq.h> + sdmmc: mmc@ff0c0000 { + compatible = "rockchip,rk3288-dw-mshc"; + reg = <0xff0c0000 0x4000>; + interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&cru HCLK_SDMMC>, <&cru SCLK_SDMMC>, + <&cru SCLK_SDMMC_DRV>, <&cru SCLK_SDMMC_SAMPLE>; + clock-names = "biu", "ciu", "ciu-drive", "ciu-sample"; + resets = <&cru SRST_MMC0>; + reset-names = "reset"; + fifo-depth = <0x100>; + max-frequency = <150000000>; + }; + +... |